The Bible has a lot to say about baptism.
The Bible says that one may be baptized if he meets these conditions:
1. One may be baptized after he has been taught (Matthew 28:18-20). In order to be saved by the Gospel, one must hear the Gospel. It is this hearing that produces faith (Romans 10:17).
2. One may be baptized after he believes (Mark 16:16). Without belief, there is no salvation and baptism is absolutely worthless. The Hebrew writer says, "without faith it is impossible to please Him" (Hebrews 11:6).
3. One may be baptized after he confesses (Acts 8:35-39). Without confessing faith in the deity of Jesus Christ, salvation is not possible. Romans 10:9-10 says, "If you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved; for with the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation."
4. One may be baptized after he repents (Acts 2:38). Baptism is a burial of the old sinful man (Romans 6:1-5). If one is unwilling to repent of his sins, he will be eternally lost (Luke 13:3).
The Bible says that baptism is baptism if it meets these conditions:
1. It is in the element of water (1 Peter 3:20-21). The baptism of the Holy Spirit is not the baptism that is referred to throughout the New Testament. The baptism of the Holy Spirit only occurred twice in Scripture. The first was the apostles on the day of Pentecost (Acts 2) and the other was the household of Cornelius.
2. There is "much water" (John 3:23). This eliminates the possibility of sprinkling water on someone's head. "Much water" does not describe the amount of water needed for sprinkling. In fact, the word "baptize" literally means to immerse.
3. The person being baptized is "buried" in the water (Romans 6:4). Sprinkling and pouring are not burials. When someone is buried, he is completely covered over with dirt. Similarly, when someone is baptized, he is completely covered over with water.
4. The person baptizing and the person being baptized, both go down into the water (Acts 8:38). Again, the picture of the two men going down into the water does not reflect the modern idea of sprinkling and pouring. These methods of "baptizing" were not invented until hundreds of years after Christianity began.
The Bible says that baptism does the following to those who are baptized:
1. The person being baptized is saved (1 Peter 3:21).a
2. The person being baptized has his sins forgiven (Acts 2:38).
3. The person being baptized is united with Christ (Romans 6:1-5).
4. The person being baptized is clothed with Christ (Galatians 3:27).
I hope that you will take the time to read each of these references and see for yourself what the Bible says about baptism.